Would you consider a 20 Gauge? I have a Rossi 20 GA. SxS Coach Gun. Exposed hammers, 18"BBL. It is about a 1974 vintage shotgun...
It is in overall great shape with the exception of a missing "bead" sight and a very slight dent at the muzzle. Nothing that cannot be repaired in short order. Functions fine.
I have a 12ga Rossi Overland 3" chambers choked IC/M gun has 99% bluing, action takes effort to open. Bought it new when they first came out, never messed with or used much and never in the hands of a cowboy action shooter. $450 shipped.